I'm having second thoughts about being a vegetarian :( help me?

we have meat slaughtered totally legal but i find that those animals are poor because i saw chickens being slaughtered but i was sooo sad, but since God gave us dominion over and it was mentioned in several religions not only christianity it's not forbidden, but i love animals, my problem is second thoughts, i decided to start trying to be a lacto-ovo vegetarian gradually but today w ate chicken (not fancy grilled only with tomato sauce and spices) and i'm gonna have real hard cravings, i need motivation, i have flicked through vegan food and recipes there were thousands of them but they seemed boring but i wanna be healthy and i don't wanna get cancer when i grow old, how can i control my cravings?